21659421

素因数分解:

$3^1\times 7^4\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:159

約数の個数: 40

約数和(自身を含む): 35135744

約数和(自身を除く): 13476323

約数列:

[1, 3, 7, 21, 31, 49, 93, 97, 147, 217, 291, 343, 651, 679, 1029, 1519, 2037, 2401, 3007, 4557, 4753, 7203, 9021, 10633, 14259, 21049, 31899, 33271, 63147, 74431, 99813, 147343, 223293, 232897, 442029, 698691, 1031401, 3094203, 7219807, 21659421]

約数ペア:

[(1, 21659421), (3, 7219807), (7, 3094203), (21, 1031401), (31, 698691), (49, 442029), (93, 232897), (97, 223293), (147, 147343), (217, 99813), (291, 74431), (343, 63147), (651, 33271), (679, 31899), (1029, 21049), (1519, 14259), (2037, 10633), (2401, 9021), (3007, 7203), (4557, 4753)]